<template>
  <div>
    <!-- 面包屑  -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--  卡片视图  -->
    <el-card class="box-card">
       <el-alert title="注意：只允许为第三级分类设置相关参数！"
                 type="warning" :closable="false" show-icon></el-alert>
      <!--  选择商品分类  -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <el-cascader
            clearable
            v-model="selectedKeys"
            :options="cateList"
            :props="cascaderProps"
            @change="cateChange"></el-cascader>
        </el-col>
      </el-row>
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加参数</el-button>
          <!--  动态参数表格  -->
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!--  循环显示标签  -->
                <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>
                <!--  输入标签  -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!--  添加按钮  -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加属性</el-button>
          <!--  静态参数表格  -->
          <el-table :data="onlyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!--  循环显示标签  -->
                <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">{{item}}</el-tag>
                <!--  输入标签  -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <!--  添加按钮  -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!--  添加参数对话框  -->
    <el-dialog
      :title="'添加'+titleText"
      :visible.sync="addDialogVisible"
      width="50%" @close="addDialogClosed">
      <el-form :model="addForm" :rules="addRules" ref="addRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
    </el-dialog>
    <!--  修改参数对话框  -->
    <el-dialog
      :title="'修改'+titleText"
      :visible.sync="editDialogVisible"
      width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editRules" ref="editRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    name: 'Params',
    data() {
      return {
        // 商品分类数组
        cateList: [],
        // 分类级联选择框配置
        cascaderProps: {
          expandTrigger: 'hover',
          value: 'cat_id',
          label: 'cat_name',
          children: 'children'
        },
        // 分类双向绑定id数组
        selectedKeys: [],
        // 当前激活的tab
        activeName: 'many',
        // 动态参数列表
        manyTableData: [],
        // 静态参数列表
        onlyTableData: [],
        // 添加参数对话框是否显示
        addDialogVisible: false,
        // 添加参数表单
        addForm: {},
        // 添加表单验证
        addRules: {
          attr_name: [
            {
              required: true,
              message: '请输入参数名称',
              trigger: 'blur'
            }
          ]
        },
        // 修改对话框的显示
        editDialogVisible: false,
        // 修改参数表单对象
        editForm: {},
        // 修改参数表单校验规则
        editRules: {
          attr_name: [
            {
              required: true,
              message: '请输入参数名称',
              trigger: 'blur'
            }
          ]
        }
      }
    },
    created () {
      this.getCateList()
    },
    methods: {
      // 商品分类数据获取
      async getCateList() {
        const { data: res } = await this.$http.get('categories')
        if (res.meta.status !== 200) return this.$message.error('获取商品分类失败！')
        this.cateList = res.data
      },
      cateChange() {
        this.getParamsData()
      },
      // tab页点击处理函数
      handleTabClick() {
        this.getParamsData()
      },
      // 获取参数数据
      async getParamsData() {
        if (this.selectedKeys.length !== 3) {
          // 清空选中的分类下拉框ids
          this.selectedKeys = []
          // 清空动态参数和静态属性列表
          this.manyTableData = []
          this.onlyTableData = []
          return
        }
        // 根据分类id和面板获取对应的分类数据
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })
        if (res.meta.status !== 200) return this.$message.error('获取参数列表失败！')
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length ? item.attr_vals.split(',') : []
          // 设置添加新参数值时是否显示
          item.inputVisible = false
          // 设置添加新参数值绑定数值
          item.inputValue = ''
        })
        if (this.activeName === 'many') {
          this.manyTableData = res.data
        } else {
          this.onlyTableData = res.data
        }
      },
      // 添加对话框的关闭事件
      addDialogClosed() {
        this.$refs.addRef.resetFields()
      },
      // 添加参数事件
      addParams() {
        this.$refs.addRef.validate(async valid => {
          if (!valid) return
          const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName
          })
          if (res.meta.status !== 201) return this.$message.error('添加参数失败！')
          this.$message.success('添加参数成功！')
          this.addDialogVisible = false
          this.getParamsData()
        })
      },
      // 显示编辑参数框
      showEditDialog(id) {
        this.getParamById(id)
        this.editDialogVisible = true
      },
      // 编辑参数对话框关闭事件
      editDialogClosed() {
        this.$refs.editRef.resetFields()
      },
      // 修改参数
      editParams() {
        this.$refs.editRef.validate(async valid => {
          if (!valid) return
          const { data: res } = await this.$http.put(`categories/${this.selectedKeys[2]}/attributes/${this.editForm.attr_id}`, {
            attr_name: this.editForm.attr_name,
            attr_sel: this.activeName
          })
          if (res.meta.status !== 200) return this.$message.error('编辑参数失败！')
          this.$message.success('编辑参数成功！')
          this.getParamsData()
          this.editDialogVisible = false
        })
      },
      // 根据id获取参数详情
      async getParamById(attrId) {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${attrId}`, {
          attr_sel: this.activeName
        })
        if (res.meta.status !== 200) return this.$message.error('获取参数详情失败！')
        this.editForm = res.data
        // this.$set(this.editForm, 'attr_name', res.data.attr_name)
      },
      // 删除参数
      async deleteParams(attrId) {
        const confirmResult = await this.$confirm('此操作将删除该参数，是否继续？', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if (confirmResult !== 'confirm') return
        const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attrId}`)
        if (res.meta.status !== 200) return this.$message.error('删除参数失败！')
        this.$message.success('删除参数成功！')
        this.getParamsData()
      },
      // 添加参数文本框确认事件
      handleInputConfirm(row) {
        if (row.inputValue.trim().length === 0) {
          row.inputValue = ''
          row.inputVisible = false
          return
        }
        // 当输入框值不为空时
        row.attr_vals.push(row.inputValue.trim())
        row.inputValue = ''
        row.inputVisible = false
        this.saveInputParams(row)
      },
      // 保存输入框中对应的参数分类
      async saveInputParams(row) {
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(',')
        })
        if (res.meta.status !== 200) return this.$message.error('更新失败！')
        this.$message.success('更新成功！')
      },
      // 点击展示添加参数文本输入框
      showInput(row) {
        row.inputVisible = true
        // $nextTick 是当页面上的元素被重新渲染后，才会触发回调函数
        this.$nextTick(_ => {
          // 添加参数标签文本框自动获取焦点
          this.$refs.saveTagInput.$refs.input.focus()
        })
      },
      // 删除对应参数可选项
      handleClose(index, row) {
        row.attr_vals.splice(index, 1)
        this.saveInputParams(row)
      }
    },
    computed: {
      // 添加按钮是否要被禁用
      isBtnDisabled() {
        if (this.selectedKeys.length !== 3) return true
        return false
      },
      // 当前选中的三级分类的id
      cateId() {
        if (this.selectedKeys.length === 3) return this.selectedKeys.[2]
        return null
      },
      // 动态计算对话框文本
      titleText() {
        if (this.activeName === 'many') {
          return '动态参数'
        }
        return '静态属性'
      }
    }
  }
</script>

<style lang="less" scoped>
  .cat_opt {
    margin: 15px 0;
  }
  .el-tag {
    margin-right: 10px;
  }
  .input-new-tag {
    width: 100px;
    margin-left: 10px;
    vertical-align: bottom;
  }
</style>
